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Private IP Address Checker

Check if an IPv4 address is private or public.

Check Result:

Private IP Address Ranges (RFC 1918)

Class IP Range Subnet Mask CIDR Addresses
A 10.0.0.0 - 10.255.255.255 255.0.0.0 10.0.0.0/8 16,777,216
B 172.16.0.0 - 172.31.255.255 255.240.0.0 172.16.0.0/12 1,048,576
C 192.168.0.0 - 192.168.255.255 255.255.0.0 192.168.0.0/16 65,536

Special IP Addresses

  • 127.0.0.0/8: Loopback addresses (localhost)
  • 169.254.0.0/16: APIPA (Automatic Private IP Addressing)
  • 0.0.0.0: Default route / "this network"
  • 255.255.255.255: Limited broadcast

Link-Local Addresses

169.254.0.0/16 is used when DHCP is not available. Devices assign themselves an address in this range automatically.

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